/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package controlador.proveedores;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import modelo.Proveedor;
import persistencia.ProveedorBean;

/**
 *
 * @author Felipe
 */
@WebServlet(name = "ListarProveedores", urlPatterns = {"/ListarProveedores"})
public class ListarProveedores extends HttpServlet {

    @Resource(name = "jdbc/HOLAJDBC")
    private DataSource ds;

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        Connection conexion = null;

        try {

            conexion = ds.getConnection();

            ProveedorBean bean;
            bean = new ProveedorBean(conexion);

            Collection<Proveedor> lista = bean.buscarTodos();

            if (null == lista) {
                request.setAttribute("Mensaje", "NO existen Proveedores");
                request.getRequestDispatcher("/TT2/index.jsp").forward(request, response);
            } else {
                request.setAttribute("lista", lista);
                //response.se
                request.getRequestDispatcher("/Admin/Informes/Listados/ListarProveedores.jsp").forward(request, response);
            }
        } catch (SQLException ex) {
            Logger.getLogger(ListarProveedores.class.getName()).log(Level.SEVERE,
                    "No se pudo obtener la conexión a la base de datos", ex);
            request.setAttribute("Mensaje", "No se pudo obtener la conexión a la base de datos");
            request.getRequestDispatcher("/TT2/index.jsp").forward(request, response);
        } finally {
            try {
                conexion.close();
            } catch (Exception noGestionar) {
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        Connection conexion = null;
        try {
            conexion = ds.getConnection();
            String strCodigo;
            int codigo = 0;
            ProveedorBean bean = new ProveedorBean(conexion);
            Proveedor prove;
            strCodigo = (request.getParameter("RUT_PROVEEDOR"));
            if (strCodigo != null) {
                codigo = Integer.parseInt(strCodigo);
                prove = bean.buscarPorCodigo(codigo);
                if (null == prove) {
                    request.setAttribute("Mensaje", "NO existe tal Proveedor");
                    request.getRequestDispatcher("Proveedores/formConsultarProveedor.jsp").forward(request, response);
                } else {
                    request.setAttribute("registro", prove);
                    request.getRequestDispatcher("Proveedores/MostrarProveedor.jsp").forward(request, response);
                }
            } else {
                processRequest(request, response);
            }
        } catch (SQLException ex) {

            request.setAttribute("Mensaje", "No se pudo obtener la conexión a la base de datos");
            request.getRequestDispatcher("/Proveedores/formConsultarProveedor.jsp").forward(request, response);
        } finally {
            try {
                conexion.close();
            } catch (Exception noGestionar) {
            }
        }
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);

    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
